The main function of the Check Valve is to allow the passage of air or carbon dioxide in only one direction: from the pump to the aquarium. In case of a power outage, the siphoning effect can draw water back towards your equipment. By installing this valve, the flow is instantly interrupted, protecting the air pump or the expensive CO2 system from water ingress that could cause irreparable damage to their internal parts.

Made from durable, high-quality plastic, the valve features an internal mechanism (usually a spring or silicone membrane) that responds instantly to any change in pressure. Its fittings are designed to fit perfectly on 4/6mm diameter tubes (approximately 3/16\"), ensuring complete airtightness without the need for additional clamps. Its robust construction guarantees that there will be no air leaks, maintaining your pump’s performance at the highest level without any loss of pressure.

The installation of the valve is extremely simple and can be done in just a few seconds. Simply cut the air tube and insert the valve between the pump and the diffuser, paying attention to the direction of the arrow indicating the flow. Due to its small size, it remains discreet and does not affect the aesthetics of your system. It is recommended to periodically check the valve for any salt buildup or wear, to ensure that the protection of your aquarium remains active 24 hours a day.